Defining Space Around Conjugated Polymers: New Vistas in Self-Amplifying Sensory Materials

Dongwhan Lee; Timothy M. Swager

doi:10.1055/s-2003-44963

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Defining Space Around Conjugated Polymers: New Vistas in Self-Amplifying Sensory Materials

Dongwhan Lee^a, Timothy M. Swager*^b
^a Department of Chemistry, Indiana University, 800 E. Kirkwood Ave., Bloomington, IN 47405, USA
^b Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, USA
Fax: +1(617)2537929; e-Mail: tswager@mit.edu;

Abstract

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Abstract

Synthetic strategies to control interchain electronic communications within conjugated polymers (CPs) are described. Novel chemical architectures built on iptycenes, metallorotaxanes, and canopied pyrroles restrict the dimensionality of electronic structures responsible for exciton and charge transport. Structure-property relationships emerging from studies of selected systems are discussed, focusing on their implications for the sensitivity of these materials as sensors.

1 Introduction
2 Photochemistry and Electrochemistry of Conjugated
Polymers
2.1 Fluorescent Polymers
2.2 Conducting Polymers
3 Insulating Molecular Wires
3.1 Shape-Persistent Fluorescent Polymers: Pentiptycene-
Derived Porous PPE Sensors
3.2 Interlocking 3D Structures: Exciton Diffusion within Chiral Polymer Aggregates
3.3 Three-Strand Conducting Ladder Polymer: Redox
Matching and Charge Hopping in Polymetallorotaxanes
3.4 Canopied Polymer: Reversible Protonic Doping of a Porous Polypyrrole
4 Summary and Outlook

Key words

conjugated polymer - sensor - transport - exciton - fluorescence - resistivity - iptycene - poly(phenyleneethynylene) - π-π stacking - metallorotaxane - pyrrole

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